Have you tried various methods?
Some high needs babies need a long time to learn sleeping on their own and sleeping through the night.
My son is an example, fussed to suckle milk up to 10 times a night.
After patiently waiting for him to grow older and trying more methods, he finally slept through at 18 months old.
We adopted many ideas from The No-Cry Sleep Solution by Elizabeth Pantley. Read my review at:
Keep trying until you find something that clicks with your baby. All the best!